Heating bag



Feb. 14, 1928.

H. H. BAKER HEATING BAG Filed April 1.- 192s Patented Feb. 14, 192s. Y

l1,659,1aa

UNITE STATES P ,a'raNr o'Fr-'lxcagf1 i nowann n. nanna, or nUruLo,1v1-:wreak nm'rme BAG, p

, Application mea Api-u '1Q 1926. serial ma sans;

My invention relates to heating haus or like devices, and more.particularly to that type of heating device in which is eonnedn heatingcomposition capable ofv generating heat 5 upon the introduction theretoof a suitablequantity of water.4

One of the objects of this invention is to i provide the heating devicewith a casing or` bag of improved construction and in which l provisionis made for conveniently insertinc thel chemical heating element or padwith which such devices are provided` and for as geadily removing theheating element therewv rom. 'j v l Another. object of the invention isto con-` struct the casin or bag .so that certain Walls thereof, especiay-the wall to be'placed in contact with the surface of the body or arti#cle. to be heated, of material impervious to moisture. x

Another object is to make provision in the construction of the casing orbag for the escape of steam or moisture from wit-hin, without resortingto the use of perforationsor openings in any of the walls of the casingor bag; the construction so provided permittin also the entrance of airinto the casing or ag to assistV in the chemicalreaction set up Withinthe heating element upon the insaid construction also assures properevaporation. of' moisture and steam so that the chemical reaction willcontinue forI a prolonged period.

' provision of a casing or bag having a wall formed of materialimpervious to moisture and impervious or substantially impervious toair, and a wall of slow-absorbent material embodyin in its constructionminute interstices for t e admission ofrair and .for the escape ofmoisture and especially steam generated under the chemicalreaction'taking place within the casing or bag; the latter havingreferably, although not necessarily, an overying wall or .flap asacontinuation of the first-mentioned wall, which overlies or laps aportion of the wall formed of said slow-absorbent material, so that arestricted area of the latter is exposed. Y

A still further object ofy my inventionis to rovide the lwall or wallsofthe casing or lieg which are impervious tojmoisture and also to air orsubstantially so, .and which may be termed airproof,and moisture-prooftroduction of a quantity of water thereto;

A' further object of *thev invention is the' Walls, with :a moistureabsorbent lining "so that thejinterior surfaces of saidwall or walls,with which the chemical heating pad' or element lies in contact, willremain moist and assist in lengthening the time ofusefulo0- ness "ofeach charge of water furnished the chemicals with-the heating pad orelement.

The invention further hasfor its object the provision ofv a Ycasing orbag for chemical heatin ads or other similar elements, e5, which is osimple construction, inexpensive and durable, and the construction ofwhich permits of a design which isi-neat, convenient to carry,andapproaches in appearance ahand purse, thereby` providing-anarticle 10which may be used in a sick room intli'eu of.

the conyentional hot-water bag, but which may be as readily used' as atraveling com panion, especially since 'the exterior thereof ends itselftov various embellishments.-

With the above and other objects in view,

the invention consists in the novel const-rucvention is illustrated indetail in-the ac companying drawings, in which Fig. 1 is a perspectiveYview of Aa 'heating 85 device embodying my invention, vthe vsame beingshown in closed condition.

Fig. 2 -is a perspective view of the Vdevice vshowing the same open topermit the ready moval of the heating pad or element therea0A om,

I' Fig. 3 is an enlarged transverse section `*through the device, takenon h ne 3.-'3,

Fig. 4 is an enlarged sectional detail view 95 y Showlng' theconstruction of the moistureproof and air-proof wall The invention 'isadapted for use in con; nection with, and'particularly` to enclose alchemical heating pad or element which is designated bythe numeral 5.This pad or element 5` may be constructed in variousways, but usually isflexible and made in the Y form of a sack having a suitable fillingopening 6 through which heat-*generating mate- 106 rial Z is vsuppliedfto the sack. VIt is constructed of porous or. Aaifaorbeutmaterial,

" usuy canvas or-duck, and the bulk of heating a terial supplied theretois yielding or phable so that the pad or element may con- I out in 'theSubjoined ad' quantity of water is to be added through\ the fillingopening of the sack at the time generation of heatis desired. However,as

this invention pertains more particularly to the casing or bag in whichthe heating pad or element is to be placed, it will be apparent that anyother chemical heating pad or element may: be used in connectiontherewith.

Thesack isV only partly filled with the 4heating composition andtherefore retains a comparatively flat shape, and the unfilled portionof the sack, designated by the numeral 8, is adapted to be folded, as at9.

10 designates my improved bag or casing into which the heating pad orelement is placed, and it comprises two pieces of iex- 'ible material11, 12, one of which is longer than the other. "These two 4pieces ofmaterial are sevved or otherwisepconnected together alongthree of theirmarginal edges, as at 13, lto form a pocket 14, into which the filledportion of the heating" pad or element is inserted, While the unfilledportion of said pad or element extends outwardly from said pocket'and isfolded over the short piece 11 of the fie'xible material, as clearlyshown in Figs. 2 and 3.

vThe long piece 12 of flexible material extends beyond the opening ofthe pocket 14 and is folded,`as at15, to forni an overlying flap' 16.This overlying flap extends over the, unfilled extending portion of theheating pad or element 5 and conceals the samey and from its foldedportion 15 .is gradually narrowedto its outer end, as at 17. Thetapering of the flap 16 gives the bag or casing a finished appearanceand also serves an additional purpose, to appear hereinafter.. l'

While, as stated, the flexible pieces 11 and 12 may be sewed orotherwise united along three marginal portions thereof, I preferably usea binding, such asshovvn for this purpose, which also conceals the edgesof the material' and prevents frayingof the same. Furthermore, thisbinding embellishes the bag'or casing and is continued 'alongl the edgesof the flap for like purposes,

and when the bag or casing is closed it has the appearance of a handpurse.

The fiap 16 is held in closed position by .means of cnap or othersuitable fasteners,

such as shown for example at 18, the male parts of which are secured tothe short piece of material 11 forming the bag or casing,

l and which may, for convenience be referred at opposite ends.

to as the inner wall of the pocket 14. The female parts of the fastenersare secured to the flap 16, which is a part of the long piece ofmaterial 12 and part of which latter may, for convenience, be referredto as the outer Wall of the pocket 14.

When the {iap 1G is closed, the inner wall 11 of the pocket 14 has anelongated exposed portion 19 along its lower portion and by reason ofthe flap being tapered, said inner Wall has triangular exposed portions20, 21, The short piece of mate rial or inner wall 11 of the pocket 14is formed of canvas, duck, or other porous and absorbent material, whilethe long piece forming the outer wall of the pocket, designated by thenumeral 22, and the flap 16 is made of moist-proof and preferablyairproof material..

' The long piece of material serving as the outer wall 22 of the pocketand as the flap 16, is of duplexniaterial of the kind in which an outerlayer 23 and an inner layer 24 is provided, one fastened to the other inany approved manner so as to form a unitar element or structure. Theinner layer 24 1s absorbent in nature and consequently porous, While theouter layer is moist-proof and preferably airproof. v

While there are decided advantages in using a two layer material of thetype men tioned,'or its equivalent, it is to be understood that certainadvantages of my invention will be inherent in the bag or casing, asconstructed, if a moist-proof material without the absorbent innerfacing is used for the outer wall of the pocket and the flap, or foreither.

The complete device, as shown-in Fig. 1, occupies comparatively littlespace and may be placed in a drawer or stored away in any position foruse. It may be made in various sizes, and in large size may be used forsick room purposes in lieu of a hot-water bag. In its smaller sizes itmay be placed in ones pocket for alleviating rheumatic pains, or.

for other purposes.

Owing to the fact that a portion of thel as the filling opening 6 isformed in the unfilled extending portion of the pad; but, if desired,the pad may be easily Withdrawn from the pocket preparatory to supplyingthe water.

' Aftery supplying the pad With water, it

may be kneaded, Within or Without the casing, such manipulation assuringcontact of the Water with all portions of the commi nuted materialWithin, thus assuring quicker chemical reaction and consequently instantgeneration of heat. During the generation of heat, moisture will escapethrough, thewill reach the outerv surface of the flap 1b i of the bag orcasing, nor the outerv surface of the outer' Wall 22 thereof, due tosuch lo parts being of moisture-proof material. Since the iiap 16 of thebag or casin'gcovers 'the ma'or portion of the inner wall, only theexpose Vportions 20, 21 and 22 will be moist to the touch, and since theouter Wall 22 only t is to be placed in Contact Withl the part or` tothe chemical composition Within the heatf ing pad or element assuresprolonged and slovv evaporation of the moisture.

By constructing the entire inner Wall 11 of the pocket of anabsorbentor'porous Vmaterial and covering the 'major portion thereof with amoisture-prooff material, such as the flap 16 is constructed of, saidinner Wall Will remain moist over a longer period of time than wouldotherwise -be possible, and such moisture maintained in contact with theheating pad or element greatly-prolimited area of surface'of said linnerwall exposed tothe air assists in prolonging the period of heatgeneration, as this results in slotvevaporation of moisture'. f

inner surface of the outer Wall 22 isl faced or lined with an absorbentmaterial or layer, as is the inner surface ofthe'ap 16, these partsbecomeJ andremain moist, although escape of moisture through said walland flap is impossible. y

rlhe bag or casing 10 therefore presents moistened walls -in contact.with opposite sides of the heating -pad or element and maintains thechemical composition Within the pad in a moistened condition over amaximum period. of time, assuring prolongedchemical reaction andconsequent heat.

I After the, moisture is fully absorbed,gen eration of heat ceases, buta further supply of Water to the pad, any time aftei' being dried, willagain set up a chemical reaction and consequent generation of heat;'this being continued until the 'potentials of the ingredientsbecome'exhausted, after which a may beuse vI claim is pad or element ispositioned, but no moistureV v 'sack'being in contact with saidabsorbent longs the period of heat generation. Thel prising a chemicalheatin pad havinga po- Moreover, by reason of the fact vthat theV andthe other being of moisture-proof matenew pad. is used, or ifdesired,the same sack, with new in redients substituted for the old,

Having thus described my invention, what. 1. device of the characterdescribed," comprising a sack of absorbent material containing achemical heating composition, and a casing enclosing .said sack andformed partly of-an absorbent material and partly T5` of` amoisture-proof material, all of said moisture-proof material and a partonly of said last-mentioned absorbent material being exposed.- Y

2. A ldevice of the character described, comprising a sack of absorbentmaterial con'- tainin heat generating material adapted to be moistened,and a casing enclosing said sack` and formed partly of a porousabsorbent material having a limited exposed area and partly of amoisture-proof matey rial having a portion overlapping said porousabsorbentmaterial.

3. A device of the character described, comprising a sack of absorbentmaterial containing vmaterial adapted to generate heat under moisture,and a casing enclosing said'v f sack `and formed in part of awater-proof material .having an absorbent lining', said lining andabsorbent material.l 4. A devicefofl the kind described, comprising achemical heating pad, and a casing having a pocket in which said pad isinserted, one wall of said pocket being of porous material and the otherof Water-proof material, said last-mentioned Wall having an extensionserving as a flap to overlie a portion of said porous material.

5;-A device of the kind described,'com

proot` material, and a, flap of moisture-proof 12.0

'material extending` from said outer `wall and overlapping the majorportion of said inner Wall.

7. A casing for-'a chemical heating pad-'- having moisture-proof wallsforming part thereof and an absorbent wall partly covered by one of saidmoisture-proof walls and partly exposed. y

8. `A casing for a 'chemical heating pad having a. pocket, the `inn'er"vwall of said .130

pocket. being of poronsmaterial, the outer wall being' ot'moisture-proof material coextensive with said inner Wall, said outerwall having an extension serving as a flap 'and being folded over theopen end of said pocket and onto said inner wall, said flap being ofslightly smaller area than said inner wall and leaving limited areas. ofsaid inner wall exposed.

S). A casing for a chemical heating pad having a porous Wall :it oneside thereof and n' -inoisture-proof wall -atthe other side thereof.

10. A casing for a chemical heating pad having a porous Wall at one sidethereof, a moisture-proof Wall at the othei` side thereof, andmoisture-proof means to cover the major portion of said porous Wall.

11. A casing for a chemical heatingr pad having Walls whose innersurfaces are moisture absorbing, one of said walls having provisioninherent therein for the escape ot' moisture from Within, and the otherhaving an external moisture-proof portion.

. Tn testimony whereof I allix my signature HOWARD H. BAKER.

